/*
 * Copyright (C) 2018 Touchlab, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package co.touchlab.stately.concurrency

/**
 * A simple lock.
 * Implementations of this class should be re-entrant.
 */
expect class Lock() {
    fun lock()
    fun unlock()
    fun tryLock(): Boolean
}

expect inline fun Lock.close()

inline fun <T> Lock.withLock(block: () -> T): T {
    lock()
    try {
        return block()
    } finally {
        unlock()
    }
}
